Aliens often erase the memories of people they abduct. But you can still determine if you’ve been taken aboard a starship or examined by extraterrestrials with tips from two of the world’s leading experts.

All you have to do is check for the telltale signs of alien abduction, including memory loss, sudden illness, unusual dreams, missing hair, bruises or strange marks on your body.

Those symptoms almost certainly indicate that you’ve been abducted by aliens.

“Many people have been abducted by aliens but can’t remember anything about their abductions,” said Dr. Brad Steiger, author of the bestselling book, The UFO Abductors.

“UFO abductees often find they have blank spots in their memories. In some cases it is simply a tantalizing sensation that there is something they are trying to remember but can’t recall.”